接收机自主完好性故障检测隔离算法研究

Study on the Receiver Autonomous Integrity FDE Algorithms

在RAIM算法中,通过计算HPL的值来判断算法的可用性.然而,RAIM算法是否可用与卫星定位误差没有必然关系,当RAIM算法判断卫星导航不可信时,需要提供实际的卫星定位误差.针对此问题,利用FDE功能,对当前水平位置的误差进行估计,提出通过计算HUL,作为是否可用卫星导航的参考值.同时,给出了HUL的计算过程及仿真测试结果,结果证明了HUL的价值和意义.

The RAIM algorithm calculates the HPL to determine the availability of RAIM algorithm.However,the availability of RAIM algorithm is not necessarily related to the satellite positioning error.When the RAIM algorithm judges that the satellite navigation is not reliable,it needs to provide the actual satellite positioning error.In order to solve this problem,the FDE function is used to estimate the error of the current horizontal position,and the HUL is proposed to be used as the reference value of satellite navigation.Moreover,the calculation process and simulation test results of HUL are given.The results prove the value and significance of HUL.